Book-locking device



Feb. 5, 1924: 1,482,781 c. BLODGETT BOOK LOCKING DEVICE Filed A112. 16 1920 Patented Feb. 5, 1924.

PATENT OFFICE.

UNITED STATES CHARLES L. BLODGETZE, OF ALAMEDA, CALIFORNIA, ASSIGNOR OF ONE-HALF TO MARY L. LARSEN, OF OAKLAND, CALIFORNIA.

BOOK-LOCKING DEVICE.

Application filed August 16, 1920. Serial No. 403,888.

To all whom it may concern:

Be it known that 1, CHARLES L. BLODGETT, a citizen of the United States, residing at Alameda, in the county of Alameda and 6 State of California, have invented certain new and useful Improvements in Book- Lockin Devices, of which the following is a specification.

This invention relates to an improvement in book locking devices.

The object of this invention is to provide a lock which can not easily be tampered with, without discovery.

Another object is to provide a strong lock which can be easily manufactured.

Referring to the drawing which forms a part of this specification;

Figure l is an end View of a book embodying my invention, one cover being shown in an open position.

Figure 2 is a sectional view taken on the line 2-2 of Figure 1.

Figure 3 is a vertical sectional view of the locking post.

Figure 4 is a similar view taken at right angles to Figure 3.

Figure 5 is a sectional view taken on the line 55 of Figure 4.

Figure 6 is'a vertical sectional view of a locking post with the catches removed.

Figure 7 is a fragmentary side view of a locking bar.

Referring more specifically to the drawing, a plurality of posts are secured to a book 2 in a Well known manner. One of these posts (1) is a locking post. The leaves 3 of the book 2 are permanently held between the ends of the posts by means of locking bars 4. Each locking bar 4 has a groove 5 cut therein and so spaced that the groove seats within the locking post 1 where it is permanently retained in a. manner to be described. i

The locking post 1 is reamed out at each end to form a shoulder 6. The thinned edges are bent over the end plates 7 and 8, which rest against the shoulders 6. The bent edges cannot be tampered with without detection, and the end lates cannot easily be forced outwardly. butting against the end plates 7 and 8 are latches 9 and 10, slidably mounted in the locking post 1 and which have notches 11 and 12 respectively formed therein. Holes 13, 14, and 15, 16, are formed in the locking post 1 in registry with the notches l1 and 12 respectively. A spring 17 is positioned between the latches 9 and 10, to create an outward pressure thereon. Lugs 18 and 19 in the locking post 1 are adapted to fit into grooves 20 and 21 in the latches 9 and 10 respectively. The latches are thus prevented from turning their notches out of alignment with the holes in the locking post The locking bars are inserted thru the holes 13 and 14 or 15 and 16 and through the notches 11 and 12. The latches are slightly depressed by the locking bar until the groove 5 registers with the notch, when the spring 17 forces the latch outward into the groove and permanently retains the bar.

The groove engaging sides of the latches are flattened as at 22 and 23 so that a straight, fiat engaging surface is formed.

Having described my invention; I claim:

1. A locking post including a hollow member inwardly projecting flanges at the ends thereof, latches slidably mounted in the member, means whereby said latches are normally urged outwardly, said flanges serving as stops for the latches.

2. A locking post including a hollow member, latches slidably mounted in the ends thereof, said latches have notches formed therein in registry with holes in the locking post, a spring interposed between the latches, said latches having each a groove therein, a lug on the locking post adapted to fit within the groove whereby the notches and holes are kept in alignment, the ends of the hollow member being upset so as to form inwardly extending flanges, which serve as a stop for the latches.

3. A locking post including a hollow member having upset ends forming in wardly directed flanges, end plates adapted to rest against said flanges, a latch in each end of the hollow member separated by a hollow spring, and means whereby said flanges are held gainst rotation.

In testimony whereof I affix my signature.

CHARLES L. BLODGETT. 

